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Nikhilshaiwale
Member

Join Date: Mar 2012
Posts: 6

Ventury Nozzle Design

03/13/2012 7:47 AM

Hello everyone...

I would like to know what will be the minimum operating pressure for ventury effect to take place for a flat fan type spray nozzle giving uniform spray..The water to be injected is at atmospheric pressure.

I tried many designs but what i could find was minimum required pressure of 5 bars..

for nozzle having following details..

design type: Rectangular design

degree of convergence.. 45

degree of divergence .....30

spray angle ...120

spray (opening) area .... 44 mm sqr

I seek your expert opinion for the optimised performance required for minimum operating pressures..

Also the nozzle is found to be very much noisy..So any suggestions for noise reduction are also invited...
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Pathfinder Tags: Ventury nozzle design
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Anonymous Poster #1
#1

Re: Ventury Nozzle Design

03/13/2012 7:57 AM

http://en.wikipedia.org/wiki/Injector
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jesw55
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Join Date: Aug 2010
Location: Wales, UK
Posts: 391
Good Answers: 18
#2

Re: Venturi Nozzle Design

03/13/2012 9:54 AM

Hi,

Try www.exair.com they have a huge range of high efficiency nozzles of all types and they are very quiet.

Best regards,

John

__________________
 Best advice I can give as you get older "Never miss an opportunity to relieve yourself"
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ajwinemaker
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Join Date: Dec 2008
Location: Australia
Posts: 143
Good Answers: 24
#3

Re: Ventury Nozzle Design

03/13/2012 7:59 PM

I would ask the manufacturer, as they would have the most experiance with your particular venturi.

Each manufacturer/model venturi would have different requirements & performance characteristic.

Other advice ...

1. Try varying the pressure/flow of the motive stream (ie if you are using air to drive the venturi effect, change the pressure / flow you are operating at).

2. Try changing the suction height of the water to be drawn up by vacuum. Even thoough it is at atmospheric pressure, the venturi is likely drawing the water up. Try changing the height of the venturi relative to the water surface.

3. Consider adding dispersant chamicals to the water to aid the formation of smaller droplets. You are looking for something that changes the surface tension.

Good luck

Anthony
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